{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:24WM3CPDOYIEGM5KVBPYV7AK2L","short_pith_number":"pith:24WM3CPD","canonical_record":{"source":{"id":"astro-ph/0603774","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-28T21:19:25Z","cross_cats_sorted":[],"title_canon_sha256":"9018df0112dd859074965ce2c1544ed36952c5e15b59ec04e68d8b694bc5278a","abstract_canon_sha256":"8d888662334f4749a9d26fcb3f85f835ef52aa9441b8f2d2ff690e385ea26a7d"},"schema_version":"1.0"},"canonical_sha256":"d72ccd89e376104333aaa85f8afc0ad2ca4b627db795b496a4cfbfb605ac053a","source":{"kind":"arxiv","id":"astro-ph/0603774","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0603774","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0603774v1","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0603774","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"pith_short_12","alias_value":"24WM3CPDOYIE","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"pith_short_16","alias_value":"24WM3CPDOYIEGM5K","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"pith_short_8","alias_value":"24WM3CPD","created_at":"2026-07-04T16:58:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:24WM3CPDOYIEGM5KVBPYV7AK2L","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0603774","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-28T21:19:25Z","cross_cats_sorted":[],"title_canon_sha256":"9018df0112dd859074965ce2c1544ed36952c5e15b59ec04e68d8b694bc5278a","abstract_canon_sha256":"8d888662334f4749a9d26fcb3f85f835ef52aa9441b8f2d2ff690e385ea26a7d"},"schema_version":"1.0"},"canonical_sha256":"d72ccd89e376104333aaa85f8afc0ad2ca4b627db795b496a4cfbfb605ac053a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:58:31.641185Z","signature_b64":"mqctboaZ+iiNL1ItQ4aLgSQF6ETTcQtQ3dXzzrkLDwBnJBgISJD7/ROgufEUQWkLQel5QHX0OytHiMg1LT45Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d72ccd89e376104333aaa85f8afc0ad2ca4b627db795b496a4cfbfb605ac053a","last_reissued_at":"2026-07-04T16:58:31.640746Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:58:31.640746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0603774","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:58:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pz1nty/oSOxMSXN+kejvgqcxbwE6iCpkjKZptmV/GRl3Zhsi61qOQnmzX5wd8TT1dV9/P6nDU/mpY8/droAoAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:43:21.050932Z"},"content_sha256":"ed474cb0c2c4cdea6744617364e92a4c1705cc48a7710d7a5c35fdd246ae5a6f","schema_version":"1.0","event_id":"sha256:ed474cb0c2c4cdea6744617364e92a4c1705cc48a7710d7a5c35fdd246ae5a6f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:24WM3CPDOYIEGM5KVBPYV7AK2L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Debris Disks Around White Dwarfs: The DAZ Connection","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. E. Winget, Mukremin Kilic, S. K. Leggett, Ted von Hippel","submitted_at":"2006-03-28T21:19:25Z","abstract_excerpt":"We present near-infrared spectroscopic observations of 20 previously known DAZ white dwarfs obtained at the NASA Infrared Telescope Facility. Two of these white dwarfs (G29-38 and GD362) are known to display significant K-band excesses due to circumstellar debris disks. Here we report the discovery of excess K-band radiation from another DAZ white dwarf, WD0408-041 (GD56). Using spectroscopic observations, we show that the excess radiation cannot be explained by a stellar or substellar companion, and is likely to be caused by a warm debris disk. Our observations strengthen the connection betwe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0603774","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0603774/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:58:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k7hKUXxY0+K044u3kXEmimwyvmG4+FddThupmMoKUlJdmQ7qwSphpGeGJ9uRoWGKYMcMK26Wt8K5TQkty2rqDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:43:21.051344Z"},"content_sha256":"14c3f64f4c95e6a603f52928b694e7a18e5665357ce689df702bde1a75bd7902","schema_version":"1.0","event_id":"sha256:14c3f64f4c95e6a603f52928b694e7a18e5665357ce689df702bde1a75bd7902"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/24WM3CPDOYIEGM5KVBPYV7AK2L/bundle.json","state_url":"https://pith.science/pith/24WM3CPDOYIEGM5KVBPYV7AK2L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/24WM3CPDOYIEGM5KVBPYV7AK2L/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-04T23:43:21Z","links":{"resolver":"https://pith.science/pith/24WM3CPDOYIEGM5KVBPYV7AK2L","bundle":"https://pith.science/pith/24WM3CPDOYIEGM5KVBPYV7AK2L/bundle.json","state":"https://pith.science/pith/24WM3CPDOYIEGM5KVBPYV7AK2L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/24WM3CPDOYIEGM5KVBPYV7AK2L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:24WM3CPDOYIEGM5KVBPYV7AK2L","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8d888662334f4749a9d26fcb3f85f835ef52aa9441b8f2d2ff690e385ea26a7d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-28T21:19:25Z","title_canon_sha256":"9018df0112dd859074965ce2c1544ed36952c5e15b59ec04e68d8b694bc5278a"},"schema_version":"1.0","source":{"id":"astro-ph/0603774","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0603774","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0603774v1","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0603774","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"pith_short_12","alias_value":"24WM3CPDOYIE","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"pith_short_16","alias_value":"24WM3CPDOYIEGM5K","created_at":"2026-07-04T16:58:31Z"},{"alias_kind":"pith_short_8","alias_value":"24WM3CPD","created_at":"2026-07-04T16:58:31Z"}],"graph_snapshots":[{"event_id":"sha256:14c3f64f4c95e6a603f52928b694e7a18e5665357ce689df702bde1a75bd7902","target":"graph","created_at":"2026-07-04T16:58:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0603774/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present near-infrared spectroscopic observations of 20 previously known DAZ white dwarfs obtained at the NASA Infrared Telescope Facility. Two of these white dwarfs (G29-38 and GD362) are known to display significant K-band excesses due to circumstellar debris disks. Here we report the discovery of excess K-band radiation from another DAZ white dwarf, WD0408-041 (GD56). Using spectroscopic observations, we show that the excess radiation cannot be explained by a stellar or substellar companion, and is likely to be caused by a warm debris disk. Our observations strengthen the connection betwe","authors_text":"D. E. Winget, Mukremin Kilic, S. K. Leggett, Ted von Hippel","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-03-28T21:19:25Z","title":"Debris Disks Around White Dwarfs: The DAZ Connection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0603774","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ed474cb0c2c4cdea6744617364e92a4c1705cc48a7710d7a5c35fdd246ae5a6f","target":"record","created_at":"2026-07-04T16:58:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8d888662334f4749a9d26fcb3f85f835ef52aa9441b8f2d2ff690e385ea26a7d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-28T21:19:25Z","title_canon_sha256":"9018df0112dd859074965ce2c1544ed36952c5e15b59ec04e68d8b694bc5278a"},"schema_version":"1.0","source":{"id":"astro-ph/0603774","kind":"arxiv","version":1}},"canonical_sha256":"d72ccd89e376104333aaa85f8afc0ad2ca4b627db795b496a4cfbfb605ac053a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d72ccd89e376104333aaa85f8afc0ad2ca4b627db795b496a4cfbfb605ac053a","first_computed_at":"2026-07-04T16:58:31.640746Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:58:31.640746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mqctboaZ+iiNL1ItQ4aLgSQF6ETTcQtQ3dXzzrkLDwBnJBgISJD7/ROgufEUQWkLQel5QHX0OytHiMg1LT45Bw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:58:31.641185Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0603774","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed474cb0c2c4cdea6744617364e92a4c1705cc48a7710d7a5c35fdd246ae5a6f","sha256:14c3f64f4c95e6a603f52928b694e7a18e5665357ce689df702bde1a75bd7902"],"state_sha256":"6966b47af9deded8066f441448322f095d8866a07f86d37620714455be672184"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8cuQPHy7s+aOJkKbim3xyXKOMrHms33PTLHZidr+x05FcoZwtQwlL7uT9als9nvhfQloqPKrklqRA2og+AQSBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T23:43:21.053180Z","bundle_sha256":"f973fbcf8f308aacea77949af882947d6a741f6ef8202cd233ecda78cdff1bbe"}}